Lesson 1Path of radial nerve in the armpit and upper arm: connections to armpit blood vessels, upper arm bone head, and latissimus dorsi muscleHere we trace the radial nerve in the armpit and upper arm, explaining its links to the armpit artery, upper arm bone head, latissimus dorsi muscle, and nearby tissue layers, focusing on places where it can get squeezed, risks from injuries, and ways to reach it in surgery.
Links to armpit artery and veinPath around upper arm bone head and neckLinks to latissimus dorsi and teres majorTissue tunnels and possible squeeze spotsSurgical ways in the upper armLesson 2Important markers for finding the nerve at bedside and in surgery: outer elbow bump, radial bone head, spiral groove, supinator tunnelThis part points out dependable outer and inner markers for finding the radial nerve and its branches, helping with bedside checks, ultrasound scans, and surgical access near the outer elbow bump, radial bone head, spiral groove, and supinator tunnel.
Feeling the outer elbow bump and radial bone headFinding the spiral groove on the upper arm boneSpotting the supinator tunnel areaUltrasound markers for radial branchesSafe areas for surgical accessLesson 3Key small-scale anatomy: outer nerve cover, inner nerve cover, innermost nerve cover, blood vessels in nerve and effects on injury and healingWe explain the small-scale structure of the radial nerve, including outer cover, inner cover, innermost cover, and blood vessels inside, showing how these parts react to pulling, squeezing, and cutting, and how they affect regrowth, lump formation, and repair methods.
Outer cover structure and surgical careInner cover and bundle setupInnermost tubes and fiber supportBlood vessels in nerve and risk of poor blood flowSmall-scale structure and healing waysLesson 4Brachial plexus beginnings and part in radial nerve (C5–T1): back cord making and body differencesThis part looks at how C5–T1 beginnings make the back cord and radial nerve, pointing out space links in the neck and armpit, common body differences, and how these affect weakness, feeling loss, and electrical test results.
C5–T1 beginning parts in radial nerveLayout of main parts, splits, and cordsBack cord making and branch patternUsual beginning and cord body differencesEffects of high or low beginning injuriesLesson 5Back interosseous nerve (PIN): going through supinator (Frohse arch), motor branches to forearm stretching muscles, usual branch patternHere we look closely at the back interosseous nerve, from entering the supinator and Frohse arch to its motor branches for forearm stretching muscles, describing usual and different branch patterns and their role in specific weaknesses and surgical plans.
Entry under ECRB to supinatorFrohse arch structure and differencesPath inside supinator muscleMotor branches to wrist and finger stretchersPatterns in specific PIN weaknessesLesson 6Spiral (radial) groove structure: place next to upper arm bone, branches to triceps and anconeus, blood vessel linksThis part studies the spiral groove part, describing its spot on the back upper arm bone, links to triceps and anconeus branches, nearby blood structures, and why this area is open to harm in breaks, trapping, and operations.
Outer and x-ray findingLinks to triceps and anconeus branchesTouch with back upper arm bone surfaceRadial side blood and deep upper arm blood vesselsRisk areas in upper arm bone breaksLesson 7End motor and feeling areas: stretching compartment muscles, triceps, brachioradialis, anconeus, finger stretchers, and back hand feeling mapThis part maps end motor and feeling areas, connecting each radial nerve branch to certain stretching muscles, triceps, brachioradialis, anconeus, and back hand skin zones, to help exact bedside finding and electrical test reading.
Motor map of triceps and anconeusSupply to wrist and finger stretchersBrachioradialis and ECRL supply zonesBack hand and thumb feeling areasPatterns of overlap with middle and inner nervesLesson 8Usual body differences affecting patient signs: high split, extra branches, changing supply to brachioradialis and ECUWe look at usual radial nerve body differences, including high split, extra branches, and changing supply to brachioradialis and ECU, stressing how these change patient signs, nerve flow studies, and surgical hopes.
High radial split patternsExtra branches to triceps or brachialisChanging supply to brachioradialisECU and ECRB supply differencesEffects on muscle electrical and nerve flow testsLesson 9Split at outer elbow/elbow: outer feeling branch and deep branch (back interosseous nerve) body detailsWe study the radial nerve split near the outer elbow, comparing the outer feeling branch and deep motor branch (PIN), their bundle setup, links to the radial bone head, and effects for trapping, shots, and surgical freeing.
Structure at the outer elbowSplitting into outer and deep branchesLinks to radial bone head and joint coverBundle layout at the splitTrapping and harm from procedures risksLesson 10Forearm path of outer branch: under skin route, branches to back of hand and snuffbox areaThis part traces the outer radial nerve along the forearm, detailing its under-skin path, tissue planes, branches to the back of the hand and snuffbox area, and how this structure guides feeling tests, blocks, and surgical cuts.
Path deep to brachioradialisChange to under-skin spotBranches to back of hand and fingersSnuffbox area links and branchesSpots of Wartenberg syndrome squeeze
